# SDR QR9R20211227005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 27, 2021
- Submitted: December 27, 2021
- Operation: General aviation
- Filed by: [M1 Support Services, repair station QR9R369D](https://openairdocs.org/faa-repair-station/QR9R369D/m1-support-services.md) (OpenAirDocs)
- Make and model: Bolkms BK117C2
- Aircraft serial: 15723789757
- Aircraft time: 2,691 hours
- System (JASC): [2215 · Autopilot Main Servo](https://openairdocs.org/jasc/2215)
- Part: None
- Part number: 41800876400
- Part serial: 709277
- Condition: Fault Message
- Stage of operation: HO
- How discovered: V
- Nature of condition: J
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QR9R20211227005

## Discrepancy

DURING ACF P/U, ACTUATOR LIGHT ILLUMINATED. TEST FLIGHT : DURING AP TEST ACTUATOR AND AP2 CAUTION MESSAGE DISPLAYED ON CAD WITH AMBER YAW MESSAGE ON BOTH PFD, SECOND AP TEST PASSED. WHEN COLLECTIVE POWER APPLIED ACTUATOR AND AP1 & AP2 MESSAGE APPEARED ON CAD, AP1 & AP2 DISPLAYED OFF ON AP CONTROL PANEL. AP CONTROL PANEL RESET AP1 &AP2, WHEN POWER APPLIED AGAIN ACTUATOR MESSAGE APPEARED ON CAD. REPLACED YAW SEMA IAW AMM 67-20-00, 4-14.

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